Real-Time Transport Protocol (RTP) Payload Format for the Variable-Rate Multimode Wideband (VMR-WB) Audio Codec
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From: The IESG <firstname.lastname@example.org> To: IETF-Announce <email@example.com> Cc: Internet Architecture Board <firstname.lastname@example.org>, RFC Editor <email@example.com>, avt mailing list <firstname.lastname@example.org>, avt chair <email@example.com> Subject: Protocol Action: 'Real-Time Transport Protocol (RTP) Payload Format for the Variable-Rate Multimode Wideband (VMR-WB) Audio Codec' to Proposed Standard The IESG has approved the following document: - 'Real-Time Transport Protocol (RTP) Payload Format for the Variable-Rate Multimode Wideband (VMR-WB) Audio Codec ' <draft-ietf-avt-rtp-vmr-wb-12.txt> as a Proposed Standard This document is the product of the Audio/Video Transport Working Group. The IESG contact persons are Allison Mankin and Jon Peterson. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-avt-rtp-vmr-wb-12.txt
Technical Summary: This specification defines the RTP payload format for the 3GPP2 defined VMR-WB codec. The payload format supports a highly optimized conversational mode, and a octet-aligned mode with aggregation and support for frame interleaving to reduce the effect of packet loss when aggregating frames. The codec is able to support both 8kHz and 16kHz audio input sampling frequency, this results in the unusual solution to have an RTP timestamp rate that is not necessary the same as the sampling audio sampling rate. Working Group Summary: The working group supported advancing this specification. The 3GP22 liaison informed the IETF that this document is a critical dependency. Protocol Quality: This payload format uses packetization methods that are well known and used by other RTP payload formats and are known to work. The RTP timestamp solution has been heavily discussed and consensus has been reached on the solution. Magnus Westerlund is the WG shepherd for this document.